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Trial Number 1

Client Number 149

Project Number 3

Trial Purpose:

To evaluate the effectiveness of a solvent and aqueous based cleaners on the removal of acrylic and silicone adhesives from stainless steel coupons using unheated and heated immersion as a replacement for NMP.

Date Run:

02/06/2020

Experiment Procedure:

Twelve pre-weighed stainless steel coupons, three for each cleaner, were soiled for each contaminant tested. Approximately 0.5 g of the soil was applied using a hand held swab. Each set of coupons were placed into a beaker and immersed for 30 minutes. During this process, any noticeable soil removal was observed at ten minute intervals. Coupons were allowed to dry for 24 hours, and afterwards final weights were recorded as well as efficiency of removal was calculated for each coupon cleaned. This process was then repeated with the application of a heated immersion.

Trial Results:

Table 1: Unheated Immersion Acrylic

Cleaner Conc. Initial wt. of cont. (g) Final wt. of cont. (g) % Cont. Removed % Average
Aquavantage 1400 GD 10% 0.5078 0.4125 18.77 19.04
0.4132 0.3398 17.76
0.7461 0.5924 20.60
Surface Clean 930 2% 0.4284 0.3319 22.53 26.40
0.5068 0.3369 33.52
0.4074 0.3131 23.15
SC Aircraft and Metal Cleaner 1% 0.3893 0.2876 26.12 25.95
0.5171 0.4175 19.26
0.636 0.4296 32.45
Sta-Sol® ESS 160 100% 0.4052 0.3683 9.11 18.67
0.5334 0.4288 19.61
0.5471 0.3977 27.31

Table 2: Unheated Immersion Silicone

Cleaner Conc. Initial wt. of cont. (g) Final wt. of cont. (g) % Cont. Removed % Average
Aquavantage 1400 GD 10% 0.5603 0.502 10.41 7.24
0.591 0.5456 7.68
0.552 0.532 3.62
Surface Clean 930 2% 0.4133 0.391 5.40 6.06
0.6106 0.5706 6.55
0.519 0.4866 6.24
SC Aircraft and Metal Cleaner 1% 0.5225 0.4986 4.57 5.21
0.5579 0.5226 6.33
0.4982 0.4747 4.72
Sta-Sol® ESS 160 100% 0.5504 0.5473 0.56 1.78
0.5818 0.5639 3.08
0.4602 0.4524 1.69

Table 3: Heated Immersion Acrylic

Cleaner Conc. Temp. Initial wt. of cont. Final wt. of cont. % Cont. Removed % Average
Aquavantage 1400 GD 10% 145° F 0.4011 0.291 27.45 25.67
0.4632 0.37 20.12
0.5516 0.3892 29.44
Surface Clean 930 2% 90° F 0.5563 0.4179 24.88 26.98
0.293 0.212 27.65
0.5133 0.3674 28.42
SC Aircraft and Metal Cleaner 1% 140° F 0.4291 0.3647 15.01 16.27
0.3131 0.264 15.68
0.3738 0.3061 18.11
Sta-Sol® ESS 160 100% 130° F 0.5067 0.379 25.20 18.82
0.3531 0.3376 4.39
0.5076 0.3712 26.87

 Table 4: Heated Immersion Silicone

Cleaner Conc. Temp. Initial wt. of cont. Final wt. of cont. % Cont. Removed % Average
Aquavantage 1400 GD 10% 145° F 0.6875 0.6757 1.72 5.67
0.6501 0.6277 3.45
0.3591 0.3165 11.86
Surface Clean 930 2% 90° F 0.504 0.5 0.79 1.80
0.5575 0.5328 4.43
0.5587 0.5577 0.18
SC Aircraft and Metal Cleaner 1% 140° F 0.4012 0.2981 25.70 11.25
0.634 0.6167 2.73
0.7278 0.689 5.33
Sta-Sol 100% 130° F 0.5114 0.4913 3.93 3.79
0.4732 0.452 4.48
0.5676 0.5508 2.96

 

Manufacturer Product Name Immersion Method Acrylic Adhesive Silicone Adhesive
Efficiency % Efficiency %
Brulin Holding Company Aquavantage 1400 GD (10%) Unheated 19.04 7.24
Heated   (145° F) 25.67 5.67
International Products Surface Clean 930 (2%) Unheated 26.40 6.06
Heated     (90° F) 26.98 1.80
Gemtek SC Aircraft and Metal Cleaner (1%) Unheated 25.95 5.21
Heated    (140° F) 16.27 11.25
JR Hess Sta-Sol® ESS 160 Unheated 18.67 1.78
Heated  (130° F) 18.82 3.79

Success Rating:

Test showed little or no promise.

Conclusion:

All of the chemistries evaluated were not efficient in the removal of acrylic or silicone adhesive in both unheated and heated immersion, but an improvement was seen with heat. The next step will be to apply agitation using ultrasonics. Silicone will be the only contaminant tested going forward due to it being the hardest contaminant to remove thus far.

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